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News Summary: Tech companies up perks

PERK PARADE: More than ever before Silicon Valley firms want their workers at work. Yahoo CEO Marissa Mayer has banned working from home, and many more offer prodigious incentives for coming in to the office, like free meals, massages and gyms.

STAY AND PLAY: Apple's "Spaceship Headquarters" will include an orchard for engineers to wander. Google's new campus will feature walkways angled to force accidental encounters. Facebook will have a Disney-inspired campus including a B-B-Q shack, sushi house and bike shop.